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(No Model.) 2 Sheets-Sheet 1, C. L. MAHNIGKE.

STEAM PUMPING ENGINE. No. 414,156. Patented 0011.29, 1889.

25 wig? {B3 Wines/S65 (No Mode-1.) 2 Sheets-Sheet 2.

O. L. MAHNIOKE.

STEAM PUMPING ENGINE.

No. 414,156, Patented Oct. 29. 1889.

Wi ness ex UNITED STATES PATENT OFFICE.

CHARLES LUDlVlG MAIINICKE, OF COLUMBUS, OHIO, ASSIGNOR OF TWO THIRDS TO JOHN D. WVELLS AND WM. N. WVEINMAN, BOTH OF SAME PLACE.

STEAM PUMPING-ENGINE.

SPECIFICATION forming part of Letters Patent No. 414,156, dated October 29, 188 9.

Application filed July 16, 1889. Serial No. 317,710. (No model.)

To aZZ whom it may concern.-

Be it known that 1, CHARLES LUDWIG MAHN- ICKE, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented a new and useful Improvement in Steam Pumping-Engines, of which the following is a specification.

My invention relates to steam pumping-engines; and my improvement consists in the construction and arrangement or combination of parts hereinafter fully disclosed in the description, drawings, and claim.

The object of my improvement is to sim plify the construction of the pump in the provision of a single solid plug-valve adapted to operate the exhaust-channels within the auxiliary valve-chest and directly connected to the operating parts of the engine, whereby the auxiliary valve is operated by a positive motion working in conformity with the piston of the pump. This is the precise improve ment which I claim in connection with the hollow distributing-valve provided with holes in its ends for the admission of steam to the ends of the valve-chest.

Figure 1 represents a side elevation of the steam-cylinder, steam-chest, valve, and piston rod of my improved pumping-engine; Fig. 2, a vertical longitudinal section of the same, showing the lower part of the steam-cylinder broken off and removed, Fig. 3, a vertical cross-section on the line 0c of Fig. :2; Fig. 4, a horizontal longitudinal section of the valve chest and the governing-valve, and Fig. 5 a view of the governing-valve.

In the drawings, the numeral 1 indicates the steam-cylinder, in which the piston 2,11aving the piston-rod 3, slides in the usual manner. The usual steam-channels a extend from the ends of the cylinder and open with their ports 5 in the valve-chest 6. The exhaustport 7 is located between said ports and com municates with the exhaust-channel 8. The live steam enters through a port 9 in the top of the valve-chest. A hollow distributingvalve 10 fits and slides within the valve-chest, being shaped to conform to the interior form of said valve-chest, and has an inward bulge 11 upon its under side, which is sufficiently large to cover and connect one steam-port 5 and the exhaust-port 7 at one time. Said hollow valve is provided with main ports 12 in its under side and near the ends, and one of said ports may alternately be brought to register with one of the steam-ports 5 when the valve is reciprocated. A longitudinal guideslot 13 is formed in the side of the hollow valve, and the inner end of a screw 14 projects into said slot, said screw being inserted through the side of the valve-chest. The valve will be prevented from turning within the valve-chest by said screw and slot, the valve and chest being preferably cylindrical, and said screw and slot will also serve to guide and limit the stroke of the valve, as the slot is of the exact length of the stroke. Alongitudinal slot 15 is formed in the upper side of the valve and registers with the live-steam port9 of the valve-chest, being of about the same length as the stroke of the valve, and conse quently registering at all times with said livesteam port, forming a live-steam port for said valve. Small holes 16 are formed in the ends or heads of the hollow valve and admit of steam entering the spaces in the ends of the Valvechest between the heads of the latter and of the valve. TWo steam-channels 17 extend from near the ends of the valve-chest to a smaller auxiliary or governing valve-chest 18, located upon the side of the main valve-chest 6. Said smaller valve-chest is cylindrical, is formed with two axial stuffing-boxes 19 at its ends and With two enlargements 20 in the ends of its bore, and has an exhaust-port 21. at its middle, which communicates with the exhaust-channel 8. through a channel 22. A solid cylindrical valve 23 slides Within said smaller valve-chest, and is secured with its axial bore upon a valve-rod 24, which slides in the boxes 19 of the valve-chest. Said valve is preferably secured upon said rod by driving said rod through the axial bore of the valve, said bore being just sufficiently large to fit snugly and securely upon the rod. Two stops 25 are secured upon the outer portion of the valve-rod, and an arm 26 is secured upon the pistomrod of the engine and slides with a bore 27 in its upper end upon the valve rod between said stops. The stops are so adjusted upon the valve-rod that they will be alternately struck by the arm at the ends of the stroke of the pistoirrod, being secured upon the valve-rod by set-screws 28 or simi- .lar fastenings, and their adjustment upon said valve is such that the valve within the smaller valve-chest will alternately cut off communication between one steam-channel 17 and the exhaust-port 21 and uncover said port for communication between it and the.

of the cylinder to the right of thefpis ton,

driving the latter from right to left andforcingthe exhaust-steam out of the cylinder through the steam-channel and exhaust port and channel, The steam Within the hollow valve has also escaped through the hole in the right head of the valve, and has kept said valve in its position in the left e nd of 'the yalve-chest by its pressure between the right lieads of the valve and valve-chest. When thepiston andpiston-rod arrive. at the end of their stroketo the left, the arm 26 will strike theleft stop 25, and. force the valve-rodand governing-valvefli and23 to the left, leaving free exhaust of steamfrom the right end of the valve-chest and shutting off exhaustfroin theleft end of, the same. This will cause the pressure between the left heads of the main valve and valve-chest to be greater thanbetween the right headsof the same and will force the valve to the right, when live steam will'be admitted to the left end of the cylinder and exhaust will take place from the right end. The piston and piston-rod will now move from left to right, shift the governing-valve at the end of the stroke,a nd thus continue the reciprocation of the piston and piston-rod. v t

It will be seen by reference to the above description and to the drawings that the supply of live steam may be cut off at any part ,ofthe'stroke of the piston,so as to admit of the steam operating by expansion,by adjust in'gthe stops 25 upon the valve-rod so as to slide or shift said rod and its valve at any part of the stroke of the piston and rod.

The main valve is balanced from within and without by the steam within it and the steam which escapes through the holes in the ends of the same, so that said valve may be reciprocated without binding and jamming in the valve-chest, and the steam which escapes between the heads of the valve and valvechests through the holes in the former will cushion the stroke of the valve and prevent it from hammering either its own heads or the heads of the valve-chest at the ends of its stroke.

The entire engine is simply and durably constructed. Only three ports and a solid valve are employed for governing the stroke of the main valve, and said solid smaller valve is made Without packing-rings or other packing, as its function to uncover the small exhaust-port in the smaller valve-chest does not necessarily require a perfect steam-tight fitofthesame, H I V v I am aware thatin steam pumping-engines of this :class steam-actuated distributingvalves have been used for controlling the movements of the main distributingvalve, and also that steanractuated distributingvalves have been controlled bysmallerreciprocatingvalves actuated from the pump or engine; butI am not aware that a single'plug or solid cylindrical valve and the arrangementofchannfels and ports shown in connection therewith'have beenemployed in engines of this classa construction which is simple and effective; and therefore, althoughl make no claim, broadly, fol-combining a hollow steam-actuated distributing-valve with a smaller valve, for controlling it,

I do claim as new V In a steam pumping-engine, the'combination, with a main valve-chest having livestea'm port s and an exhaust-port and a hollow valve within the same provided with main steam-ports. and having holes in its ends, of a smaller auxiliary valve-chest 18,'having channels 17 at its ends, which connect'with theoends of said valve-chest and one exhaustchannel 22 at its middle, "which directly connects with'the exhaust-channel of the main valve-chest, and a solid cylindrical valve'23 within said auxiliary valve-chest and providedwith a rod 24, directly connected to the operating parts of the engine to be reciprocated by the same, substantially as described. In testimony whereof Ihave hereunto set'my hand in the presence of two subscribing witnesses.

CHARLES LUDWIG MAIINICKE.

WVitnesses:

O. S. Benn I ARTHUR S. FELCH. 

